Planographic-printing machine.



PLANOGRAPHIC PRiNTiNG MACHINE.

APFucArwN FILED DEC. :9, 191a.

Patented July 9, 1918.

2 SHEETS-SHEET I.

$91M WM S. G. BOSS, PLANOGRAPHIC PRINTING MACHINE. APPLICATION FILED 05c. :9 19m.

1 ,272.032. Patented July 9, 19b.

2 SHEETS SHEET 2.

UNITED STATES PATENT OFFICE.

'SAMUEL c. Goss, or GLENCOE, ILLINOIS, nssmnon TO THE coss rn mrmo rnnss GOM- PANY, or omcnco, rumors, A conronnrxon or-nmwoxs.

PLANocnArHic-rnmrmc M cHmn.

To nil-whom. it may concern.

lle it lmowuthat I, SAHL'EL G. Goss, a citizen of the Inited States, and a resident of (Henroe, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Planographic- Printing Machines, of which the following is a specification. reference being had to the llCCUlllpHllylllg drawings.

My invention relates to planographic printing machines in the application of Ernest James Smith, Serial No. 111,603. filedJuly 2?; 1916, and it has for its principal object the :1 new and improved form and arrangement oi driving menus and of means for controlling the water and inking mechanisms and for moving the transfer cylinders out of contact with the form cylinders. It is one of the objects ot' thc invention to provide an improved arrangement of parts by reasouoi which the form cylinders and the inking mechanism may be operated without a corresponding forward movement of the well. whereby at the start of the operation of the machine the inking mechauisurmay be operated by itself for obtaining a properly inked condition prior to the start of the printing operation. It is another object of my invention to provide improved means for insuring that the transfer cylinders shall he moved out of contact with the form cylinders whenever the press is brought to rest at the close of a. printing operation, or is brought to its slow-speed operation for any reason. It is nnothelzohiect of their)- veution to provide improved mechanism whereby the press may be opcrated at slow speed, with the folder and other Web-forservlng thus to keep the designs upon the form cylinders in proper. condition for a subsequent; continuation of the run f the press... It is another ob ect of my i tion warding" ptirts thrown out of operation, .3

to provide automziticallly actingmeans for throwin the folder and other web-forwarding niec ianismsont o'foperction when the variable s eed 'driving is changed from the high-spec to the is another-object ofomyfinvcntion to improve planogr'ap it: prmtim machines of this general ype sundry details as pointed out hereiiifli er. The prcferred nieiins by whichil have accomplished my several Specification '0: Letters Patent. Application filed December 19, 1918. sci-151th. B73762.

'objects are illustrated in the drawings and ot' the general type shown provision .of

form cylinders ed by a means low specd operations It Patented July 9, 191s.

are hereinafter specifically described. That which I believe to be new and desire to cover by this a p li'cction is set forth in the claims.

In the 'rawings:

Figured is a side view of a. press embodying the preferred form of my improvements lookingto vard the ends of the cylinders oi the, recs;

Fig. iZ-is 11 plan view of the motor and the connecting driving mechanism-by which the press given either a high speed or a; low speedope'rction; and i Fig. '3 is a view showin the form of pawl and ratchet mechanism or connecting two of the gears of the driving mechanism to their respective shafts.

Referring to the several figures of the drawings, in which corresponding parts are indicated by the same reference charactcrs,

10 indicates the framework of the ress having form cylinders 11-12 revo ubly mounted upon shafts 1314, respectively, jourualed in said frameysaid form cylinders being adapted in the construction shown to support planographic forms of any approved type. Movably mounted adjacent to the forincylinders 11-12 nrejtwo tran s- I fer cylinders 15-16 journaled by means of shafts 1718, respectively, -in bearin blocks 19-20 which are movable diagonally downward and-outward so as to carry the cylinders 15- 16 out of contact with the V and out; of operative enga ement with cachother. In the donstructlon shown, each of the blocks 19--20 is support air of toggle arms 21 connected together, ygmndjnstable link 22 whereby the cylinders 15- 16. are adapted to be moved insuniscn, asi hereiincftcr described;

The fonn'cylin'clers 11 12 are adapted to be driven from; the cylinders 15-=-16 by of'intcrmeshinggcars, the cylinder 15 belng in turn driyen from the cylinder 16; e construction is'such that when the cylinders 15-46 are moved downward and away each other the teeth of the drivmg" gears'lcre continncd in meshing engageeven after-[the operat ve enga ment of, the cylinders hesbi ndiscon'timr Theycylindel 16 1s driven in clockwise direction in Fig, 1 by means of a gear 23 which in turn is driven by means of a gear 24 meshing with the high-speed gear 25 of the driving mechanism.

Referring now particularly to Figs. 2 and 3 for a brief description of the driving .mechanism, 26 indicates a motor of any suitable type having a gear 27 mounted upon its drive shaft 28. A large with the gear 27 is revolub y mounted upoh a laterally extending shaft 30, a clutch mechanism 31 being adapted for connecting said gear 29 with the shaft 30 as may be desired, the connection being effected throu h a stroke of a lever .32 connected with t e clutch mechanism and actuated as hereinafter described. The gear 25 above referred to is revolubly mounted upon the shaft .80, be-

ing connected by means of pawls 33 and a ratchet 34 with the said shaft .30 whereby upon the rotation of the shaft 30 in counterclockwise direction in Fig. 3 the gear 25 is driven thereby, serving to drive the cylinder 16 in clockwise direction in Fig. 1. The

proportions of the train of drivln mechanism from the motor 26 to the cy inder 16 as above described are such as to drive the cylinder 16 at the desired normal high-speed rotation.

The shaft 30 is connected by means of bevel gears 35-36 with a longitudinally-extending shaft 37 which is connected by means of gears 38, 39 and 40 with a folding mechanism 41 of any suitable type, whereby such folding mechanism is adapted to be driven at the desired speed of rotation from the shaft 30. A bevel gear 42 is connected with the driving gear 40 so as to rotate therewith, said bevel gear 42 being in mesh with a bevel gear 43 mounted upon a verticallyextending shaft 44. The shaft 44 is connected by means of bevel gears 45-46 with a longitudinally-extending shaft 47 which is connected by means of bevel gears 48-49 with a roller 50 about which the web 51 passes in its movement from thetransfer cylinders 1516 to the folder 41. The shaft 44 is also connected b means of bevel gears 52-53 with a longitu inally-extending shaft 54 which is connected by means of bevel gears 55-56 with a webforwarding roller 57.

Means is provided for driving the gear 25 from the gear 29 independently of the shaft 30 and at a comparatively much lower rate of rotation, the arrangement being such that the cylinders 15-16 may be driven atthe' slower speed While the folder 41 and the 'web-forwarding rollers 50 and 57 are per-. mitted to remain silent. This means comprises a pinion 58 revolubly mounted upon the shaft 30 so as to rotate with thegear 29', the pinion 58 being in mesh with a gear 59 revo ubly mounted upon a shaft 60. .The gear 59 is adapted to be operatively connected with the shaft 60' by" means of a gear 29 meshing clu'tch mechanism 61 which is adaptpd to be thrown into operation by a roper stroke of a lever 62 which is connected by means of a link 63 with an operating lever 64 (see Fig. 1); The shaft 60 is provided with a gear 65 revolubly mounted thereon and connected thereto by means of pawls 66 carried by the gear adapted to engage a ratchet 67 fixedly mounted upon the shaft. As is best shown in Fig. 3, the arrangement of the pawl and ratchet mechanism is such that upon the rotation of the shaft 60 in clockwise direction in Fig. 3 the gear 65 will be driven in the same direction by the pawl 66 unless such gear is being driven more rapidly in the same direction by the gear 25 with which it meshes As will be readily understood from an examination of Figs. 2 and 3, when the gear 27 is driven in the direction indicated by the arrow thereon, with the clutch 31 in operation for connecting the gear 29 to the shaft 30, the gear 25 will be driven at the normal high-speed in counterclockwise direction in Fig. 3, serving to drive the gear (55 at the same speed in clockwise direction in said figure. At the same time the shaft 60 will be driven in clockwise direction in Fig. 3 at the slow speed rate of rotation through the pinion 58 and the gear 59; It will be underl stood that the clutch 61 might be thrown out of operation for disconnectin the gear on from the shaft 60, but ordinarily this would not be done, inasmuch as it is unnecessary for the proper operation of the device. hen it is desired to silence the welrforwardin means and the folder, and to drive the cylinders 15-16 at their slow-speed rotation, the clutch 31 is thrown out of opera Means is provided for shifting from the high-speed to the low-speed operation, serving at the same time to move the cylinders 15-46 out of operative position. This means comprises a lever 68 pivotally mounted upon the framework '19 and provided with a toothed sector 69 which meshes with a gear 70 fixedly mounted upon a rotary cam member 71. The cam member 71 is provided with a cam slot 72 which operates in connection with a stud or roller 73 mounted upon an arm 74 fixedly mounted upon the shaft'75 upon which one of the lower toggle-arms 21 is fixedly mounted The construction is such that upon the initial portion. of a stroke of the lever 68 toward the left in Fig. 1, the arm74 is moved toward the right in said figure, buckling both setsiof toggle-arms 21 toward the right and set-v ing thus-to move the transfer cylinders 1516 slightly out ofoperative position.

The same rotation of the shaft serves to swing :1 toothed sector 70 toward the left in said Fig. 1, serving to rotate an intermeshing toothed sector 77 in clockwise direction .in Fig. 2. The sector 77 is connected by means of an arm 78 and a link 79 with the lever 32, whereby, upon the movement of The sector 77 in clockwise direction in Fig. flfthe lever is moved in counl'crcloclnvise dii ection in said figure serving to throw the clutch 31 out of operation. This expedient has the result, as above explained, of changing the drive from the high Speed to the low speed.

Inking mechanism is provided for the form rollers 11 12, comprising inking cylinders .8081 revoluhly mounted'upon the framework 10 by means of shafts 82-83, respectively. I The ink is carried from the cylinders 81 to theform cylinders 1l-12 by means of suitable inking mechanisms carried by frames 84 journuled upon the shafts S'Z-S3, the construction and arrangement being such that when the frames 5t areswung outward away from each other the form rollers carried by said frames are moved out of cont-not withlhe form cylinders. Ink is fed to the inking cylinders 80--81 by means of any suitable train of mechanisms comprising reciprocating rollers 86 which are actuated by means of cums 87 of any suitable. type and driven from any suitable. source of power. Ink is supplied to the reciprocatorv rollers so from fountain rollers 88 which nre driven. intermittently by means comprising links 89 connected with the cams 87 and reciprocated thereby. The links 50 are connected at theirupper ends with arms 90 which in turn are col'inected with arms 91 which are provided with pawls 92 engaging ratchet Wheels 93 which are adapted to rotate with the fountain rollers 38. Shroudplates 94: a're swingingl mounted adjw cent to the pa Wis 92, adapted to be moved. by means of arms 95 into position to throw the pawls 92out of operation, whereby upon the continued rotation of the cams 87 the formrollers 88 are caused to remain silent. The arms 95 are adapted to be swung, for moving the shroud-plates 94, by .I'l'lBlLIlS of links 06 connected at their lower ends to hell crank levers 97 which are connected by means of longitudinally-extending links 9899 with the lower end of an arm 100 which is pivotally mounted upon the framework 10; The arm 100 is provided with a stud or roller 101 which Works in a. cam groove 102 formed in the cam member 71, the arrangement being such that, upon the nextssucceeding portion of the rotation of the cam member following the initial "}JOI- tion by which the cylinders 15--1(r are thrown out of operative position, the arm 100 is swung toward the right in Fig. 1, serving to move the. links 9 899 towz rd the right for carrying the links 96 and the arms 95 downward, serving to throw the pawls 02 out of operation. By this expedient, the supply of fresh ink to the inking cylinders 8081 and from, such cylinders to the form cylinders 11..12 is cut oil.

Means is )IU\'ll((1 for swinging the frzunes S1 outward for 'arrying the form rollers 85 out of contact with the form cylinders 1l-12, comprising gears 103 fixedly mounted upon roclcshnfts 101 which are connected with said frames by means of links 105 and eccentrics 106. The arrangement is such that upon the rotation of the shafts 101 in either direction the frames 814 are moved outward away from ouch other. The shafts 101 and the gears 103 are adapted tobe ro tntcd in unison by means of toothed sectors 10? which are revolubly mounted upon the shafts lir -1 1 of the form cylinders, being, connected together by a link 108. One of the sectors 10?" is provided with an adjusttl lharm 10? which is connected by means of .1 link 109 with :1. bell-crank lever 110 one arm of which is provided with a stud or roller lit r :rking in a cam slot 1.12 in the cum member T1. The arrangement is such that, uponlhe portion of the rotation of the cum member 71 following that by which the supply of ink is cut oil from the inking cylinders fill--81, the lever 110 is moved in conntercloclcwise direction in Fig. 1 serving to swing the sectors 107 in unison to ward thelelit in said figure, serving to more the form rollers 85 out of operative conlnct with the form cylinders 11 12.

Voter mechanism is provided for each of the form cylinders 1112 comprising frann-s 113 pivotally mounted upon the framework 10. said frames being provided with nn v suitable form of mechanism by which inoi. ture may be applied to the form cylinders. In the construction shown, the water mechanisms comprise rollers 114 which are adeptedto be moved out of contact with the form cylinders 11-12 upon an appropriate swinging of the frames 113, as will be readily understood. The frames 113 are provided with arms 115-1) fixedly connected thereto, said arms being connected together b3, u link 11.17 which. in turn is connected by means of a link .118 with a lever 119. The lever 110 is provided with a stud or roller which works in a cam groove 121 formed in the ciun member 71, the nrran ement being such that, upon the portion of t e rotation of the cam member ,71 following that by which the form rollers 85 are thrown out of operative V lposition relativeto the cylinders 11--12, the

water rollers 114 are moved out of operative contact with the said cylinders 11-12.

As will be appreciated from the above description, when the lever 68 is given its initial movement for changing from the hi 11- speed to the'loW-speed operation, the fol er ion cylinders be properly and web-forwarding means are thrown out of operation and the transfer cylinders 15-46 are thrown out of operative position relative to each other and relative to the form cylinders 11-42. With the parts in this position, the form cylinders l1-12 may be operated at slow speed with both the inking mechanism and the water mechanism in operation, the designs upon the form cylindels 1112 being thus kept in proper condition. If it-is desired to keep the form cylinders 11-l2 in rotation at the slowspeed with the form rollers 85 in contact therewith, but with the supply of fresh ink cut oil from the form rollers 85, this may be accomplished by a further stroke of the lever (38. A still further stroke of the lever serves to throw'the form rollers 85 out of contact with the form cylinders, and the final portion of the stroke of the lever 68 serves to throw the water mechanisms out of operative position. The press can then be stopped either by stopping the rotation of the motor 26 or by throwing the clutch 6]. out of operation through the medium of the lever A. \Vhen the press is being started into operation with a fresh design upon the form cylinders, it is often desirable that the form inked before the movement of the web between the transfer cylinders is started. This result may be brought about by a movement of the lever (58 in the direction for starting the press, restricting the movement to approximately three-quartors of its complete stroke whereby the form cylinders Will be rotated at slow-speed with the water mechanisms and the inking mechanisms in full operation, but with the web silent. When the cylinders l1-12 have attained a properly inked condition, the lever 68 can be given the final portion of its stroke for bringing the transfer cylinders into op erative position and for otherwise bringing the press into condition for effective operation.

That which I claim as my invention, and desire to secure by Letters Patent, is,-

1. In a )rinting machine, the combination of a form-cylinder, a folder, variable speed mechanism for driving said form-cylinder and said folder at normal high speed in operative relation to each other, and means serving to throw said folder out of operation when the driving mechanism is shifted from its high speed to its low speed.

2. In a printing machine, the combination of a form-cylinder, a folder, driving mechanism comprising a high speed shaft and a loW speed shaft, means operatively connecting said high speed shaft with said form-cylinder and said folder for driving them at normal speed in operative relation to each other, and means operatively connectin'g said low speed shaft with said formcylinder adapted to permit said folder to remain silent upon the low speed drivin 3. In a printin machine, the combination of a form-cylinder, a folder, a driving member operatively connected with said folder for driving it, a second drivin member operatively connected with sai formeylinder for driving it, connections between said first-named driving member and said second member adapted to cause said second member to rotate upon the rotation of said first-named member in its operative direction but adapted to permit said second memher to rotate in the same direction independently of the first-named member, and means for driving said second member independently of said first-named member.

4. In a printing machine, the combination of a form-cylinder, a folder, a high speed driving shaft operatively connected with said folder for driving it at normal high speed, a gear operatively connected with said form-cylinder for driving it, connections between said shaft and said gear adapted to cause said gear tdrotate upon the rotation of said shaft for driving said folder but adapted to permit the gear to rotate in the same direction independent of the shaft, and means for driving sai' glen;- at slow speed independently of said s 1a t. f

5. la a printing machine, the combination of a form-cylinder, a folder, a high spec-d driving shaft operatively connected with said folder for driving it at normal high speed, a gear operatively connected with said form-cylinder for driving it. pawl-anit-ratchet connections between said shaft and said gear adapted to cause said gear to rotate upon the rotation of the shaft for driving said folder but adapted to permit the gear to rotate in the same direction independently of the shaft, and means for driving said gear at slow speed independently of said shaft.

6. In a printing machine, the combination of a. form-cylinder, a folder, a high speed driving shaft operatively connected with said folder for drivingit at normal high speed, a gear, operatively connected with said form-cylinder for driving it, conneetions between said shaft and said gear adapted to cause said gear to rotate upon the rotation of the shaft for driving said folder but ad: ted to permit the gear to ro tate indep; ently of the shaft, and means adapted when the shaft is silenced to drive said car it slow speed.

7-. n a rinting machine, the eombina tion of a arm-cylinder, a folder, a high speed driving shaft 0 eratively connected with said folder for riving it at normal high speed, a gear operatively connected' with said form-cylinder for driving it, con- 1,272,032 5 nections between said shaft and said gear 12. In a planographic printing machine,

adapted to cause said gear to rotate upon the rotation of the shaft for driving said folder but ada )ted to permit the gear to rotateindepenc ently of the shaft, and con stantly-driven means adapted to permit said ear to rotate at high speed but adapted W en the high speed driving means is disconnected therefrom to drive the gear at low s eed.

8. n a printing machine, the combina tion of a form-cylinder, a folder, a high speed driving shaft operatively connected with said folder for driving it at normal high, speed, a gear ,operatively connected with said form-cylinder for driving it, pawl-and-ratchet connections between said shaft and said gear adapted to cause said gear to rotate upon the rotation of the shaft for driving said folder but adapted to permit the gear to rotate inthe same direction independently of the shaft, and means domiprising pawland-ratchet mechanism for driving said gear at slow speed but ada ted to permit the high speed rotation of t e gear in the same directlon.

9. In a planographic printing machine, the combination of a form-cylinder, a transfer cylinder movably mounted adjacent to said fornrcylinder and adapted to cooperate therewith, variable s eed mechanismv for driving said form-cyhnder at either high speed or low speed, and means for throwing said high speed driving mechanism out of operation and for simultaneously moving said transfer cylinder out of operative contact with said form-cylinder. a

'10. In a planographic printing machine,

, the combination of a'form-cylinder a trans fer linder movably mounted ad acent to said f brmylinder and adapted to cooperate therewith, means for forwarding a web through saidmachine, variable speed mechanism for driving said form-cylinder and said web-forwarding means at high speed and means for throwing said high spe driving mechanism but of operation and for simultaneously moving said transfer cylinder out of operative contact'with said form-cylinder, throw said web-forwarding means out of operation.

11. In a the combination of a form-cylinder, a trans fer cylinder movably mounted adjacent to said form-cylinder and adapted to cooperate therewith, a folder, variable speed mecha nism for drivin said form-cylinder and said folder at high speed, and means for throwing said high speed driving mechanism out of operation and for simultaneously moving said transfer cylinder out of operative position relative to said form cylinder serving at the same time to throw said folder out of operation.

I stroke of -whioh serving atthe same time toplanographic printing machine,

the combination of a forn1-rylimler,'a ,transfer cylinder movably mounted adjacent lo said form-cylinder and adapted to cooperate therewith, inking mechanism for applying ink to said fornrovlimler. \ariahIe speed mechanism for driving said form-cylinder at either high speed or low speed, and a movable member by a partial operative the high. speed driving mechanism is thrown out of operation and by the next following portion of the stroke of which the supply of fresh ink is cut oil from said inking mechanism.

13. In a planographic printing machine, the combination of a form-cylinder, a transfer cylinder movably mounted adjacent to said form-cylinder and adapted to cooperate therewith, inking mechanism for applying ink to said form-cylinder, variable speed mechanism for driving said form-cylinder at either high speed or low speed, a movable member by a partial operative stroke of which the high speed driving mechanism is thrown out of operation, means actuated by the next following portion of the stroke of said movable member for cutting off the supply of fresh ink from said inking mechanism, and means actuated by a succeeding portion of the stroke of said movable member for throwing said inking mechanism out of operative position relative to said formcylinder. 14. In a planographic printing machine, the combination of a form-cylinder, a transfer cylinder movably mounted adjacent to said .formcylinder and adapted to co operate therewith, inking mechanism for applying ink to said form-cylinder,water mechanism for applying Water to said form-cylinder in advance of the application of ink thereto, variable speed mechanism for driving said form-cylinder at either high speed or low speed, a movable member by a partial operative stroke of which the high speed driving mechanism is thrown out of operation, means actuated by the next following portion of the stroke of said movable member for cutting ,off the supply of fresh ink from said, inking mech-" anism, meansactuatedxby the succeeding portion of the stroke of said movable member for throwing said inking mechanism out of operative position relative to said form-cylinder, and means actuated by the succeeding portion of the stroke of said movable member'for throwing said water ing said inking mechanism out of operative position relative to said formgylinder, and means actuated by the succe ing ortion of the stroke of said movable mem er for throwing said water mechanism out of operative position relative to said form-cylinder.

16. In a planographic printing machine, the combination of a form-cylinder, a transfer cylinder movably mounted ad acent to I said form-cylinder and adapted to coiiper- ,tiVB position relative to said ate therewith, inking mechanism for applying ink to said form-cylinder, water mec anism for applying water to said formcylinder in advance of the application of ink thereto, variable speed mechanism for driving said form-cylinder at either high speed or low speed, a lever, a cam actuated by a partial stroke of said lever for throwing said high speed driving mechanism out of operation, a cam actuated by the next following portion of the stroke of said lever for cutting oil the supply of fresh ink from said inking mechanism, a cam actuated by the next following portion of the stroke of said lever for throwing said inking mechanism out of operative position relative to said form-cylinder, and a cam actuated by the next following portion of the stroke of said lever for throwing said water mechanism out of operative position relative to said form-cylinder.

17 In a planographic printing machine, the combination of a. form-cylinder, a transfer.cylinder movably mounted adjacent to said form-cylinder and adapted to cooperate therewith, inking mechanism for applying ink to said form-cylinder, water mechanism for applying water to said form-cylinder in advance of the up lication of ink thereto variahlespeed mec anism fordriving said form-cylinder at either high speed or low speed, a movable member by a partial operative stroke of which the high speed driving mechanism is thrown out of operation and said transfer cylinder is moved out of opera;-

form-cylinder, means actuated by the next following portion of the stroke of said movable member for cutting off the supply of fresh ink from said inkin mechanism, meansactuated hy the succeed ng portion of the Stroke of said out of 0 means o frated b'y"the neat-succeeding movable member for throwing said inking mechanism out of o )erative position relative to said form-cylin er,-and means actuated by the succeeding portion of the stroke of said movable member for throwing said water mechanism out of operation.

18. In a planographic printing machine, the combination of a form-cylinder, a transfer cylinder movably mounted adjacent to said form-cylinder and adapted to cooperate therewith, inking mechanism for applying ink to said form-cylinder, water mechanism for applying water to said form-cylinder in advance of the application of ink thereto, means for forwarding a web through said machine, variable speed mechanism for driving said form-cylinder at either high speed or low speed, a movable member by a partial operative stroke of which the high speed driving mechanism is thrown out of operation, means actuated by the same portion of the stroke of said movable member for throwing said transfer cylinder out of operative position relative to said form-cylinder, means actuated by the some portion of the stroke of said movable member for throwing said web-forwarding means out of operatlon, means actuated portion of the stroke of said movable mem her for cutting off the supply of fresh ink from said inking mechanism, means actuated by the succeeding portion of the stroke of said movable member for throwing said inking mechanism out of operative position relative to said form-cylinder, and means actuated by the succeeding portion of the stroke of said movable member for throwing said water mechanism out of operation.

19. In a planographic printing machine, the combination of a form-cylinder, a transfer cylinder movably mounted adjacent to said form-cylinder and adapted to cooperate therewith, inking mechanism for applying ink to said to -cy1inder, water mechanism for applying water to said form-cylinder in advance of the application of ink thereto variable speed mechanism fordriving said form-cylinder at eitherhigh speedor low speed,-cam means adapted upon a partial rotation to throw said igh speed mechanism I tion, meansactuated by the nextsucceednig portion of the rotation of said cammeans for cuttin off the supply of fresh ink from said ormsaid inkin mechanism out of operative position relative to said form cylinder,- and tion of t e"' rotationof said cam means for thinning said water mechanism out of by the next following linder, means actuated by the nexbsuccee ing portion of the rotation of said cam means for throwin .M v Opel" I etire posit on relative to said form-cylinder.- 

